What exactly are antioxidants? Do I need sunscreen every day? And what's really the best wrinkle cream? Skin experts answer your top anti-aging questions.

WHAT ARE THE BEST ANTI-AGING ANTIOXIDANTS?

Antioxidants protect the skin from things like UV rays, smog, and smoking; minimize wrinkles; and generally improve the skin. The most effective ones? CoffeeBerry, phloretin with vitamin C and ferulic acid, and idebenone, says David H. McDaniel, assistant professor of clinical dermatology and plastic surgery at Eastern Virginia Medical School in Norfolk, who specializes in antioxidants. His trick: "I really like the idea of using two different ones, either on alternating nights or one in the morning and one in the evening," he says. "The antioxidant actions are somewhat different, so getting some of both makes sense."